Correct option is A
The correct match between the type of computer network and their descriptions is:
LAN (Local Area Network): III. This type of network is found in a building but is connected with cables.
MAN (Metropolitan Area Network): IV. This type of network is found in a geographic region of the size of a metropolitan area.
WAN (Wide Area Network): I. The Internet is an example of this type of network.
WLAN (Wireless Local Area Network): II. This type of network is found in a building but is connected without cables.
So, the correct answer is (a) A-III, B-IV, C-I, D-II.